Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1996-08-23
1999-02-23
Grant, Chris
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348608, H04N 521
Patent
active
058750010
ABSTRACT:
A high definition television receiver includes a comb filter for receiving trellis coded HDTV data, the comb filter turning on if there is interference from an NTSC signal having a co-channel in the data to thereby remove the interference, and the comb filter turning off if there is no interference to thereby pass the received HDTV data; a determining part for determining if the comb filter is turned on/off and providing a comb filter ON/OFF signal according to the determination result; and a united trellis decoder having united state transitions of a partial response trellis decoder and an optimal trellis decoder, the united trellis decoder having a signal group divided into signal groups of the partial response trellis decoder and the optimal trellis decoder, thereby operating as the partial response trellis decoder according to the comb filter ON signal and operating as the optimal trellis decoder according to the comb filter OFF signal input from the determining part.
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Grant Chris
LG Electronics Inc.
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